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CONSTRUCTION OF A DOMESTIC ELECTICITY METER WITH VOICE ANNOUNCEMENT 0AIM: The main aim of this project is to implement the talking ENERGY METER by continuously measuring the Unit values, for every one unit consuming, system will announce using voice IC as ONE UNIT CONSUMED. PURPOSE: The purpose of the project is to provide an automation system for the automatic UNIT announcement for every one unit consumption. METHODOLOGY: BLOCK DIAGRAM: LCD POWER SUPPLY Power supply MICRO CONTROLLER OPTO COUPLER VOICE IC SPEAKER RELAY HOME APPLIANCE Energy Meter POWER SUPPLY: Step Down Bridge Filter Transformer Rectifier Circuit Regulator section DESCRIPTION: The deployment of electronic energy meters has gained a great deal of momentum over the past several years. This is due to their two main advantages over the traditional electromechanical designs: improved accuracy and an expanded set of features. In this project, we will discuss the implementation of a basic watt-hour meter using microcontroller. In the process, we will show how ADC with a single sample-and-hold circuit can effectively measure both voltage and load current and maintain accuracy. Besides basic energy measurement, this design also includes features that many electric utilities are very interested in rolling out on a wider basis. In our project we are using AD7755 IC for measuring energy consumed by the user. For energy measurement we have to give reference voltage and reference current to the energy meter IC (AD7755). Here we are using CT for measuring current flows through the load and the output of CT is given to AD7755. The output of AD7755 is in the form of pulses that means for 1 unit energy consumption AD7755 gives 32 pulses. The output of AD7755 is given to microcontroller through opto coupler for counting no of pulses coming from AD7755. Microcontroller will count the No. of pulses coming from energy meter IC and it will display the total energy consumed. For every one unit microcontroller will alert the voice IC, then it announces ONE unit consumed. HARDWARE USED: Microcontroller Power supply LCD Loads AD7755 Energy meter Relay Opto coupler Voice IC SOFTWARE USED: Keil micro vision Embedded C Express PCB ADVANTAGES: Like analog energy meter there is no rotating part so measurement will become accurate Easy of design and less cost compared to analog meter. DISADVANTAGES: Maximum load current will be limited and its depends on CT we are using in meter. APPLICATIONS: We can use this energy meter in houses, industries for measuring energy. RESULT: The project implements the design of a talking energy metering system which measures both current & voltage and also high power consumption will be announced whenever high power is consumed.